Warp stop-motion for looms



(No Model.) 2 Sheets-Sheet 1.

G. H. WINEGAR 82; H. 0. PARRAR.

WARP STOP MOTION FOR LOOMS'.

, 3 Patented July 8, 1890.

FFFFFFFFEfi BUEEMWLEEF =E #NN 2 Sheets-Sheet 2.

(No Model.)

G. H. WINEGAR 8v H. 0. FARRAR. WARP STOP MOTION FOR LOOMS. No; 431,637. Patented July 8,1890.

UNITED STATES PATENT OFFICE.

GEORGE H. VVINEGAR AND HORACE O. FARRAR, OF OAKLAND, MAINE.

WARP STOP-MOTION FOR Looms.

SPECIFICATION forming part of Letters Patent No. 431,637, dated July 8, 1890.

Application filed October 26, 1889. Serial No. 328,305. (No model.)

To all whom it may concern.-

Be it known that we, GEORGE H. VVINEGAR and HORACE O. FARRAR, both citizens of the United States, residing at Oakland, in the county of Kennebec and State of Maine, have invented certain new and useful Improvements in WVarp Stop-Motions for Looms; and we do declare the following to'be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

Our invention relates to a loom stop-motion for preventing floats or overshots. These defects in the cloth are caused by the breaking of the warp-threads between the harnesses and the cloth, whereby they become entangled with the adjacent threads, forming a snarl, and causing the shuttle to pass under or over the snarled threads, instead of between them. Unless they are at once detected and the loom stopped it is difficult to repair the cloth where they occur. These floats or overshots have always been a fruitful source of trouble to the weaver, and, so far as we know, no practical means of preventing them has ever come into general use.

The object of our invention is to remedy this difficulty and to provide a stop-motion which shall detect any snarl or break which may occur between the cloth and the harness,

and to automatically stop the loom when such break occurs.

Our invention, generally stated, consists of a series of feeler-wires pivoted in front of the harnesses and caused to Vibrate back and forth between the threads of the warp, said feeler-wires being connected with mechanism for stopping the looms. WVhen one or more of the wires become obstructed by a snarl, the feeler-wire fails to make a complete vibration and the stop-motion is operated.

v The invention further consists of the various combinations of parts, as set forth in the claims.

Inthe accompanying drawings we have illustrated the form of our invention which we prefer to use, although it is obvious that many modifications may be made without departing from the invention as set forth in the claims. I

In the drawings, Figure 1 is a section taken Fig. 3 is an elevation of the cams, looking from left to right. Fig. 4 is a detail of one of the elbow-levers which connect the cam with the sliding-bars. Fig. 5 is a front view of the toothed bar. Fig. 6 is a front view of the finger-bar and the finger-lifting bar, by which it is raised and lowered. Fig. '7 isa general section on line X X of Fig. 1. r Fig. 8 is an enlarged top view of the knock-off finger and the parts by which it is operated with portions of the breast beam and lay cut away. Fig. 9 is an enlarged front elevation of a portion of the lay, showing the catch which operates the knock-off finger. Fig. 10 is a section of lineX X of Fig. 9. Fig. 11 is a section on line X X of Fig. 8, looking from left to right. Figs. 12 and 13 are diagram sections showing the different positions of the feelerwires.

A is the frame of the loom. B is the breastbeam; 0, the lay; E, the reed; D, the reedcap; F, the harnesses; 'G, the cloth-beam; B, the shipper-rod; B the knock-0d finger; B the shippinglever; O, the lay-sword; g, the cloth, and w w the warp-threads. These parts are of ordinary construction and need no special description.

On the inside of the frame and directly in front of the harnesses we attach, by means of brackets H two guides or supports H, one on each side of the loom. In the inner face of each of the guides H are two vertical grooves it, placed close together, one in front of the other. In the back grooves fit the ends of the finger-bar J, (see Fig. 6,) which consequently extends entirely across the working portion of the loom, its upper end when at its highest position being somewhat below the warp. Pivoted along the upper edge of the finger-loar J is a series of fingers, which consists of a front finger P, a rear finger P and a hub P. They are pivoted by means of a rod P which passes through the hubs P, and are held by studs 19, placed at intervals along the top of the bar J. We here show and it is adjusted by the set-screw h, pass- 1 three studs for supporting the rod P but any number may be used, according to. the width of the loom.

The feeler-wires R, as here shown, are secured by their lower ends to the fingers P, and they project so that when in a vertical position their upper ends are preferably from one-fourth of an inch above the center of the shed of the warp to a half-inch below it, according as the feeler-wires are up or down, as hereinafter shown.

The finger-bar J is adapted to move vertically in the grooves h, and as here shown, and We impart this motion to it by means of the bar J, which is held vertically beneath the bar J by passing through apertures in the guides 11 H. The bar J is adapted to slide longitudinally beneath the bar J. Piv.-, oted to the top of the sliding bar J are the anti-friction rolls j, as here shown, one at or near each end, and each of these rolls impinges on an inclined edge or cam j, which is formed on the under side of the finger-bar J. Thus a movement of the bar J to the left raises the finger-bar J. To depress the bar J positively and to insure more rapid action than if it were allowed to fall .of its own weight, we secure to .the upper and under bar several sets of cams or projections 7' and 7' which have inclined faces or edges parallel with the edge of the cam j. The upper edge of the upper projection j moves against the lower edge of the lower projection Thus when the bar J moves to the right it depresses the bar J, at the same time retaining the roll j in contact with the cam j.

The ends of the sliding barJ are supported on rolls 712, which are pivoted in the guide H. The pivot of the roll 7L2 passes through a vertical slot 71 which allows vertical adjustment,

ing through the lower end of the casting. The fingers P, as herein shown,-are tilted by means of a finger-tilting bar K, Fig. 1, which slides vertically in the front groove h. The fingers P, as they fall forward by their weight, rest on the upper edge of the finger-lifting bar K. The bar K is similar in construction and is moved up and down in the same manner as the bar J, already described-viz, by means of a sliding bar K, vertically beneath it. It has on its under side cams W, on which move the anti-friction rolls 70, secured tothe finger-lifter K. The bar is depressed by means of the cams k and W, as described.

The. ends of the sliding bar K are supported on rolls h pivoted to the guide Hin slots 72;, the rolls being adjusted vertically by means of set-screws h.

Directly back of the fin ger-barJ is a toothed bar I, which has a limited longitudinal motion. Its endsz' pass through apertures in the guides H and rest on rolls h, each pivoted to a bracket H, which is provided with a vertical adjusting-slot h The tooth-bar I is provided with a series of teeth i in its front face,

which are the same in number and the same.

distance apart as the fingers P. A flange 2' on its upper edgegives it the necessary stiffness and prevents it from springing horizontally. The teeth 1' are so placed in relation to the rear fingers P that when the wires R are tilted forward the fingers will not engage the teeth when the bar is moved longitudinally; but when the wires are raised to a vertical position the fingers will enter the space between the teeth and prevent the motion of the bar. A spring i is attached by one end to a bracket a, secured to the right side of the loom-frame, and by the other to the proj ecting end 't'Of the toothed bar I.

The stop-motion is operated, as herein shown, by a set of cams T, T, and T placed side by side on a single shaft 25. The cams T T, and T impart a reciprocating horizontal" motion to the toothed bar I and the sliding bars J and K, respectively. The rearward cam T operates a bent lever i pivoted at the elbow to a shaft q. 'The lower or horizontal end of the lever has a bowl 1' of common construction traveling in the path of the cam. The upper or vertical end of the lever is pivoted to a vertical arm "P, which extends down from the bar. A similar lever j works in the cam T and is pivoted to the arm 7' secured to the bar J. A third lever It connects the cam T with the arm k attached to the bar K. The cams T, T, and T as before stated, are secured on the shaft tside by side, being held in place by a plate T and a collar t. The shaft 25 is journaled in bearings which are attached to the frame or standard Q, bolted to the floor, as here shown. Brackets :41, secured to the standard Q, support the le vers 2' k j. The cams are driven by any suitable means, as by a miter-gear u, engaging a miter-gear u, fixed on the cam-shaft V. In Fig. 2 we show in full the form of the foam T and in dotted lines the forms of the icams T and T with the relative positions of Ethe three. These cams are of such form as fito produce the motions of the three bars, which will hereinafter be pointed out. Their ;form is as follows, viz: The cam T has two conicentric surfaces-an outer t and an inner t Ethe latter being about a third of a circuma ference. These are united by short eccentric Esurfaces i The cam. T has a short inner ico'ncentric surface t (here shown as about ,one-seventh of acircumference,) and an outer. concentric surface i these being united by irelatively long eccentric surfaces 15 The icam T has a concentric surface 25 approxin1atel y half of a circumference, and two eccengtric surfaces i and t, uniting the ends of the gconcentric portion. Their relative position is such that a line, as the line marked 3, drawn from the center through the center of the concentric surface t of the cam T will pass through the point of connection between :the two eccentric surfaces i and t of the cam T and through one extremity of the concentric surface t of the cam T.

F The toothed bar I has extending down from ITO ' I Ash. l

it a vertical arm 1', on the lower end of which is a horizontal portion having an inclined end 71 1 A bifurcated lever L is pivoted by its end to some solid portion of the machine (here shown as a rigid arm N) in such a manner that inclined end 2' of the arm 7." enters the slit or bifurcation on the free end of the lever. As the arm 1 moves from left to right the free end of the lever'is raised. A shelf or ledge Z is secured to a side of the lever L, and on this ledge rests the free end of a crooked lever M, the opposite end of which is pivoted to a bearing on, secured to the breast-beam, Fig. 7. The lever is so bent that a portion of it next the pivoted end is somewhat below the lay and has a slight inclination toward the back of the loom.

- An elbow-lever O is pivoted at 0 to the arm N at a slightly lower level than the lever M at that point, and it has anarm O, inclined from front. to rear. A rod or wire 0 connects the lever O with the knock-off finger B by means of a pivoted lever 0 which rests against said knock-off finger. Thus if the lever O is drawn back the knock-off finger is thrown over and the loom is stopped. Aspring O retract-s the lever O.

Secured to the under side of the lay is a bearing 0, in which is a horseshoe-shapedcatch or dog 0, playing up and down in vertical apertures. The lower side of the bearing has curved surfaces 0 and 0 (here shown as at different levels,) and the ends of the catch project downward from these curved faces.

The adjustment of parts is such that when the lever M is raised the short end of the horseshoe-catch slides along its surface and is raised sufficiently so that the long end does not catch over the front edge of the lever O, as it would if left unsupported.

The operation of my stop-motion is as follows, viz: The toothed bar I, as already explained, has a longitudinal mot-ion. It is carried from right to left by the cam T and then drawn from left to right by the spring Each time it moves to the right the lower end of the vertical arm i, Fig. 1, slides under the end of the lever L and lifts the end of the lever M. This occurs as the lay is moving forward toward the cloth, and the short end of the horseshoe-catch striking on the inclined edge of the lever M in its raised position lifts the long end of the catch so that it fails to catch over the lever 0. If, however, the bar I fails to move to the right as the lay moves forward, .the lever M is not raised, the catch is not lifted, and consequently drops in front of lever 0 after sliding up the inclined arm 0', and then as the lay moves back the knock-off finger is thrown over, as explained, and the loom stopped. WVhen there is no snarl or float in the warp, the bar I moves freely back and forth and the loom continues to run; but when one occurs between the harnesses and the cloth the motion of the bar is obstructed by catching on one of the back wires is shown in Fig. 13.

-fingers P in the following manner, viz: In all the views in the drawings,'with the exception of Figs. 12 and 13, we have taken the loom in one positionnamely, with the lay moving forward and nearly at its front position. Referring to the cams, Fig. 2, it will be seen that the cam T has depressed its bowl to the lowest point. Consequently the sliding bar J is pushed to the left and the finger-bar J is raised to its highest point. The bowl of cam T is at its highest point, so that the bar K has m'ovedto the right and depressed" the bar K, and consequently allowed the fingers P to fall forward to the position clearly shown in Fig. 1. The upper end of the feeler-wire is below the Warp. The bowl of cam T has just reached its highest point, and consequently the bar I has just been pulled to the right by the spring 1? clearing all the fingers P. Fig. 12 shows the next position of the feeler-wire. The cams have rotated to the position marked 2 in Fig. 2. The finger lifter bar K has remained stationary at its lowest point. The finger-bar J has dropped, lowering the feeler-wir'es bodily and causing them to tilt backward as the fingers P catch on the upper edge of the bar K. In swinging backward, the upper end of the feeler-wire has dropped below the center of the shed of the warp which has been shedded, and has assumed a position slightly inclined backward from the perpendicular, immediately. in front of the harness and at its lowest position. The rear fingers P have dropped below the teeth 1"", and the toothed bar I has moved to its extreme position toward the right. The nextposition of the feeler- The cams have moved to the position marked 3 in Fig. 2. The bars J and K occupy the same relative positions; but they have both risen bodily, bringing the upper end of the feeler-wiresorne- 'what above the center of the shed, preferably about one-fourth inch. The lay has nearly reached its rearward position. The rear fingers P have entered the spaces between the teeth i From this position, as the cams rotate to the position marked 1, Fig. 2, the feelerwires fall forward, passing between the threads of the warp into the position shown in Fig. 7. If a float occurs, it is on this motion that the wire catches it, and, neglecting to fall the entire distance, prevents the rear fingers, to which it is connected, from clearing the adjacent toot-h The bar I moves to the right, pulled by the spring just as the wires reach their forward position, and if any finger is not clear it is held fast. The lever M is not lifted and the loom is stopped, as before explained.

To sum up the motions of the feeler-wire, they are as follows, viz: --Startin g with the position shown in Fig.7, the wire tilts backward, keeping below the center of the shed to avoid any float that may have been formed, to an upright position. It then rises vertically and falls forward between the threads of the warp.

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It is on this last motion that the wire is expected to encounter any floats or snarls, the other motions being introduced to let the wire into proper position for'this motion.

It is designed to have the feeler-wires sufficiently numerous and sufficiently near together to detect any float which may occur in the warp. If the Wire misses the float the first time, it will be sure to pick it up in a later motion.

The rolls on which the bars I, J, and K run are vertically adjust-able, so that the height of the wires can be varied to suit different sheds, according to the weave.

We claim 1. In a loom, the combination,with the lay and the harness, of a frame located immepath of the lay, tilting feeler-wires located in said frame, means for causing said wires to sweep through the warps, and connections between said feeler-wires and the stop mechanism of the loom, substantially as shown.

2. In a loom, the combination of a series of fingers pivoted in front of the harness, tilting feelerwires attached thereto, a verticallymovahle support to which said fingers are pivoted, a movable stop device for determining the forward movement of the fingers, and means for raising and lowering the support and moving the stop device, substantially as shown.

3. In a loom, the combination of the feelerwires, the tilting fingers, a support for carrying said fingers, means for raising and lowering said fingers and giving them a tilting motion, the series of teeth, and means for imparting a longitudinal movement thereto, said teeth being adapted to c'o-operate with said fingers and with the stop mechanism of the loom, substantially as shown.

4. In a loom, the combination of tlie feelerwires, the tilting fingers, a support for carrying said fingers, means for raising and lowering said fingers and giving them a tilting motion, a toothed bar, and means for imparting a longitudinal movement thereto, said bar being so placed that the ends of said fingers will vibrate between the teeth of said toothed bar, said bar being operatively connected with the stop mechanism of the loom, substantially as shown.

5. In a loom stop-motion, the combination of a vertically-movable bar located in front of the harnesses, a series of fingers pivoted to said bar and having each a front and rear extension, a vertically-movable bar for raising the front extensions of said fingers, a

toothed bar placed in the rear of said fingers.

and so located that the rear extensions of said fingers will vibrate between its teeth, said toothed bar being operatively connected with the stop mechanism of the loom and feelerwires attached to said fingers, and means for imparting a longitudinal movement to said toothed bar, substantially as shown.

6. In a loom stop-motion, a vertically-movfable'bar having pivoted thereto a series of fingers each having a front and rear extension, a vertically-movable bar for raising the front extensions of said fingers, and a longitudinally-reciprocating toothed bar having teeth adapted to engage said rear extensions,

.coacting with said fingers, a sliding bar adapted to move horizontally in suitable guides, and cams connecting the said bars, whereby a horizontal motion in one imparts a a vertical motion to the other, in combination, substantially as shown.

diately in front of the harness and out of the ing vertically in a suitable guide, fingers car- 8. In a loom stop-motion, an upper bar movshown.

9. An upper vertically-moving bar, as J, and a horizontally-moving bar, as J, fingers carrying feeler-wires and pivoted to said bar,

stop-mechanism-operating devices coacting with said fingers, cams j and anti-friction rolls 7, co-operating with each other to raise said bar J, and arms 7' and j attached to said upper and under bars and having co-operatin g cam-faces for positively depressing said bar J, in combination, substantially as shown.

10. The horizontally-moving bars J and K, the vertically-moving finger-bar J, and finger lifting-bar K, connected by cams with said .bars J 5' and K fin ers carr in feeler-wires and pivoted to bar J, the horizontally-movin g toothed bar I, having teeth adapted to engage said fingers, and stop-mechanism-operating devices co-operating with said bar I, in combination, substantially as shown.

11. In a loom, the combination, with the loom-frame and lay, a lever O, the knock-off finger, devices for operating the said finger from the said lever, a bent lever pivoted to the breast-beam and extending backward, and means for lifting said lever as the lay moves forward, of a horseshoe-shaped catch held vertically in guides attached to the lay, one end of said catch being adapted to ride on the bent lever when the lever is liftedand the other end when the catch is not lifted being adapted to engage with the lever O to move it and actuate the knock-0E finger, substantially as shown. 7

In testimony whereof weaffix our signatures in presence of two witnesses. GEORGE H. WINEGAR. HORACE O. FARRAR.

lVitnesses:

S. W. BATES, ARTHUR N. DENNIS.

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